Why did my check engine light come back on?
Why did my check engine light come back on? Took my car to an exhaust place, they said it was my O2 sensor or my catalytic converter. I had them change my sensor, drove 10 miles and my check engine light came back on, so I figured it was the catalytic converter. Three days after that, the check engine light turned off. How to reset check engine light with OBD-II? 1 Connect the scan tool to the OBD – II Connecting the scan tool to the OBD- II ( On- board diagnostic connector) under your steering column. 2 View error...